Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos gigabytes têm um número ISO de cn-65?
 ###Tabelas: CREATE TABLE 1980–1989 (1980–1989_id AUTO_INCREMENT PRIMARY KEY, January VARCHAR, February VARCHAR, March VARCHAR, April VARCHAR, June VARCHAR, July VARCHAR, August VARCHAR, September VARCHAR, October VARCHAR, November VARCHAR, December VARCHAR) CREATE TABLE most_career_games (most_career_games_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Games INT, Player VARCHAR, Club/Clubs VARCHAR, Career span VARCHAR) CREATE TABLE list_of_protected_forests (list_of_protected_forests_id AUTO_INCREMENT PRIMARY KEY, Central Forest Reserve VARCHAR, Size in km² INT, Total plant species INT, Tree species INT, Endemic INT, Threatened (CR,VU,EN) INT) CREATE TABLE details_of_participants (details_of_participants_id AUTO_INCREMENT PRIMARY KEY, Clubs VARCHAR, Seasons at this level VARCHAR, Settlements VARCHAR, Season joined league VARCHAR, Position in 1959–1960 VARCHAR) CREATE TABLE list_of_provincial-level_divisions (list_of_provincial-level_divisions_id AUTO_INCREMENT PRIMARY KEY, GB VARCHAR, ISO № VARCHAR, Province VARCHAR, Chinese Name VARCHAR, Capital VARCHAR, Population¹ INT, Density² VARCHAR, Area³ INT, Abbreviation/Symbol VARCHAR)  
SELECT COUNT GB FROM list_of_provincial-level_divisions WHERE ISO № = CN-65